Spin-resolved Electronic Structure of the Ferromagnetic Triple-layered Ruthenate Sr₄Ru₃O₁₀

We report spin-resolved electronic band structure studies of the triple-layered ruthenate Sr₄Ru₃O₁₀. Although the band structure of Sr₄Ru₃O₁₀ has been the subject of recent experimental and theoretical investigations [1,2]; there have been no reported spin-resolved experimental studies that explore in more details the complex magnetism of Sr₄Ru₃O₁₀. In this talk, we will present the first combined spin- and angle-resolved photoemission (SARPES) study of Sr₄Ru₃O₁₀ [3]. Our SARPES data reveal major effects of spin polarization in different parts of the Brillouin zone. We resolve two separate strong intensity narrow bands with opposite spin-polarization at 30 meV below the Fermi-level, which exhibit surprisingly dramatic temperature-dependent amplitude changes upon warming to the Curie temperature of the Sr₄Ru₃O₁₀ system. We will briefly discuss a tentative comparison between the SARPES data to spin-resolved density functional theory (DFT) calculations.



References

[1]. P. Ngabonziza, et al. , Sci. Rep. 10, 21062 (2020).

[2] G. Gebreyesus, et al., Phys. Rev. B 105, 165119 (2022).

[3] P. Ngabonziza, J. D. Denlinger, A. Fedorov, G. Cao, J. W. Allen, G. Gebreyesus, and R. M. Martin, in preparation (2022).